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<?php

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/**

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* Colors block support flag.

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* @package WordPress

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* @since 5.6.0

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/**

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* Registers the style and colors block attributes for block types that support it.

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* @since 5.6.0

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* @since 6.1.0 Improved $color_support assignment optimization.

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* @access private

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* @param WP_Block_Type $block_type Block Type.

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function wp_register_colors_support( $block_type ) {

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$color_support = false;

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if ( $block_type instanceof WP_Block_Type ) {

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$color_support = isset( $block_type->supports['color'] ) ? $block_type->supports['color'] : false;

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}

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$has_text_colors_support = true === $color_support ||

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( isset( $color_support['text'] ) && $color_support['text'] ) ||

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( is_array( $color_support ) && ! isset( $color_support['text'] ) );

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$has_background_colors_support = true === $color_support ||

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( isset( $color_support['background'] ) && $color_support['background'] ) ||

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( is_array( $color_support ) && ! isset( $color_support['background'] ) );

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$has_gradients_support = isset( $color_support['gradients'] ) ? $color_support['gradients'] : false;

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$has_link_colors_support = isset( $color_support['link'] ) ? $color_support['link'] : false;

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$has_button_colors_support = isset( $color_support['button'] ) ? $color_support['button'] : false;

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$has_heading_colors_support = isset( $color_support['heading'] ) ? $color_support['heading'] : false;

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$has_color_support = $has_text_colors_support ||

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$has_background_colors_support ||

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$has_gradients_support ||

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$has_link_colors_support ||

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$has_button_colors_support ||

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$has_heading_colors_support;

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if ( ! $block_type->attributes ) {

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$block_type->attributes = array();

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}

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if ( $has_color_support && ! array_key_exists( 'style', $block_type->attributes ) ) {

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$block_type->attributes['style'] = array(

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'type' => 'object',

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);

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}

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if ( $has_background_colors_support && ! array_key_exists( 'backgroundColor', $block_type->attributes ) ) {

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$block_type->attributes['backgroundColor'] = array(

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'type' => 'string',

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);

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}

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if ( $has_text_colors_support && ! array_key_exists( 'textColor', $block_type->attributes ) ) {

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$block_type->attributes['textColor'] = array(

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'type' => 'string',

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);

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}

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if ( $has_gradients_support && ! array_key_exists( 'gradient', $block_type->attributes ) ) {

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$block_type->attributes['gradient'] = array(

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'type' => 'string',

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);

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}

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}

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/**

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* Adds CSS classes and inline styles for colors to the incoming attributes array.

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* This will be applied to the block markup in the front-end.

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* @since 5.6.0

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* @since 6.1.0 Implemented the style engine to generate CSS and classnames.

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* @access private

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* @param WP_Block_Type $block_type Block type.

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* @param array $block_attributes Block attributes.

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* @return array Colors CSS classes and inline styles.

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function wp_apply_colors_support( $block_type, $block_attributes ) {

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$color_support = isset( $block_type->supports['color'] ) ? $block_type->supports['color'] : false;

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if (

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is_array( $color_support ) &&

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wp_should_skip_block_supports_serialization( $block_type, 'color' )

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) {

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return array();

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}

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$has_text_colors_support = true === $color_support ||

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( isset( $color_support['text'] ) && $color_support['text'] ) ||

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( is_array( $color_support ) && ! isset( $color_support['text'] ) );

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$has_background_colors_support = true === $color_support ||

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( isset( $color_support['background'] ) && $color_support['background'] ) ||

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( is_array( $color_support ) && ! isset( $color_support['background'] ) );

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$has_gradients_support = isset( $color_support['gradients'] ) ? $color_support['gradients'] : false;

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$color_block_styles = array();

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// Text colors.

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if ( $has_text_colors_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'text' ) ) {

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$preset_text_color = array_key_exists( 'textColor', $block_attributes ) ? "var:preset|color|{$block_attributes['textColor']}" : null;

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$custom_text_color = isset( $block_attributes['style']['color']['text'] ) ? $block_attributes['style']['color']['text'] : null;

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$color_block_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color;

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}

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// Background colors.

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if ( $has_background_colors_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'background' ) ) {

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$preset_background_color = array_key_exists( 'backgroundColor', $block_attributes ) ? "var:preset|color|{$block_attributes['backgroundColor']}" : null;

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$custom_background_color = isset( $block_attributes['style']['color']['background'] ) ? $block_attributes['style']['color']['background'] : null;

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$color_block_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color;

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}

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// Gradients.

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if ( $has_gradients_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'gradients' ) ) {

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$preset_gradient_color = array_key_exists( 'gradient', $block_attributes ) ? "var:preset|gradient|{$block_attributes['gradient']}" : null;

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$custom_gradient_color = isset( $block_attributes['style']['color']['gradient'] ) ? $block_attributes['style']['color']['gradient'] : null;

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$color_block_styles['gradient'] = $preset_gradient_color ? $preset_gradient_color : $custom_gradient_color;

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}

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$attributes = array();

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$styles = wp_style_engine_get_styles( array( 'color' => $color_block_styles ), array( 'convert_vars_to_classnames' => true ) );

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if ( ! empty( $styles['classnames'] ) ) {

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$attributes['class'] = $styles['classnames'];

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}

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if ( ! empty( $styles['css'] ) ) {

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$attributes['style'] = $styles['css'];

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}

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return $attributes;

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}

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// Register the block support.

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WP_Block_Supports::get_instance()->register(

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'colors',

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array(

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'register_attribute' => 'wp_register_colors_support',

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'apply' => 'wp_apply_colors_support',

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)

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);

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